Edge scraper for electrolytic tinning lines and the like



R. s. DEANS 2,386,663

EDGE SCRAPER FOR ELECTROLYTIC TINNING LINES AND THE LIKE 2 Sheets-Sheet l Filed NOV. 16, 1944 J gp55/PTS 054A@ RA S. DEANS EDGE SCRAPER EoR ELECTROLYTIC TINNING LINES AND THE LIKE Filed Nov. 16, 1944 2 Sheets-Sheet 2Y lNVE-NTOR Patented Oct. 9, 1945 f EDGE SCRAPER FOR ELECTROLSQTIC TINNING LINES AND THE LIKE Robert S. Deans, Pittsburgh, Pa., assigner to Carnegie-Illinois Steel Corporation, a corporation of New Jersey Application November 16, 1944, Serial No. 563,787

6 Claims.

My invention relates to improvements in edge Scrapers for electrolytic tinning lines and the like.

In the production of bright electrolytic tin plate, the deposited tin is melted, as for example by resistance heating of the plated strip. Since heavier plating occurs at the edges of the strip, the same requires more heat than is necessary for the body of the strip in order to flow the coating, resulting in the latter attaining an excessive temjections' I slidably received in coactlng guides 8 mounted on the tracks, as particularly shown in Fig. 4.

Each carriage 6 is powered by a weight 9 connected to the carriages by a cable I0, the latter being disposed over suitable guide pulleys II, whereby the carriages are urged toward the edges of the strip I, as particularly shown in Fig. 2. Tie-back or stop cables I2 may be provided in order to limit the travel of the carriages and to perature. Also, such heavier platine deposit may lo retract the same when necessary. be too great due to the presence of treed forma- Each carriage mounts a scraper wheel I3 of tiOn along the Strip edgeS- hardened steel, freely rotatable in an adjustable My invention @OnteinplateS prOViding means bifurcated horizontal support I4 secured to a for removing the excess plating metal from the bracket I5 on the carriage by means of a bolt I6. Strip edges bythe appliCatiOn f Self-adjuStinsr l5 Said scraper wheels are preferably mounted in a cutters to said edges. applied with equal and unisubstantially erect position transversely of the lOrm pleSSllle Without injuring the desired strip with their peripheries in contact with the bonded layer of plating metal thereOnstrip edges, and with the centers thereof slightly I also have in View, the pOSitiVe removal 0f the above the plane of said strip to effect rotation of metal Cuttings frOm the Strip so that the same the wheel by tangential components of the preswlll not interfere with subsequent processing. sum between the wheels and strip.

Additional GbleCtS and adVantageS Will beCOIrie The scraper wheels I3 are thus rotated in a diyapparent from the following description taken in rection downwardly toward the upper surface of connection with the accompanying drawings tlie strip, tending to discharge the scraped metal Wherein downwardly within box-like collectors I'I sub- Fis. 1 is an elevational view showing the applistantially enclosing the wheels, and particuiariy cation of my invention to an electroiytic tinning the lower portions thereof, said collectors having line 0r the like; discharge chutes I8 depending through the car- Fig. 2 is a sectional view thereof taken on the riages and through slots I9 in the tracks 3 and line II-lI 0f Fig- 1; i 30 base 2. A common hopper 20 is disposed beneath Fig. 3 is an elevational view of one of the and supported from the base 2 to receive the Scrapers and itS mOunting; and metal scrapings from the chutes I8 for ultimate Fig- 4 iS a SeCtiOnal VieW taken 0n the line disposal of said scrapings. The side walls of the IV--IV 0f Fis. 3. collectors il are cut away at 2| for passage-of the Referring t0 the drawingsy the Strip l @Dining 35 strip therethrough in contact with the wheels I3. from the plating tank (Het Sl10Wn).iI1 an electro- V In order to remove small particles of metal, lytic tin line or the like generally has an excessive air nozzles 22 are mounted on air lines 23 and plating metal deposit alone its edges irregularly directed upon the edges of the strip I toward the proiectingiaterally from the strip. This crystaiwheels I3 so as to blow said particles into the llne treed formation is loose and for an interval collectors I'I. after its formation iS relatively SOft Or Wet. My In order to increase the rotative travel of the improved Scraper l5 applied t0 the Strip edges scraper wheels I3, the same may be slightly while the excess plating metal is in the aforesaid canted or inclined as indicated in dotted lines in condition, and in order that said metal' may be Fig, 4, by adjustment of the support I 4 upon its removed before the strip iS further prOCeSSed, aS bolt I B. The weights 9 are of sufficient size to fOr example, by melting the plated COating. y urge the carriages so that the pressure of the For the purpose of mounting the scraping ap cutters I3 will just be suicient to remove the paratus, a channel base 2 is supported transgranular crystalline treed formation from the .versely beneath the horizontal pass line of the strip edges, without cutting or injuring' the strip, and supports spaced tracks 3 located trans- 50 latter and so as to leave the bonded tin coating versely adjacent the loci of the strip edges, said vor layer thereon. tracks having recessed longitudinal rails 4 for the It will therefore be seen that I have provided wheels 5 of scraper carriages 6. Inaddition, cara scraping apparatus which will ride or follow riages 6 are provided with depending central prothe strip without restricting lateral movement vof the latter, and which Will at all times exert an equal cutting pressure upon the strip edges. The permitted travel of the carriages 6 upon their tracks will permit of use of the scraping device upon strips of diierent widths. Also, the action of the Scrapers and the air nozzles removes the cuttings from the strip so as not to interfere with subsequent operations, as for example, during the melting treatment of the tin plate.

Various changes and modifications are contemplated within the scope of the following claims.

I claim: Y

1. An edge scraper for electrolytic tinning lines and the like wherein the tin plate is conveyed and processed in strip form, including a carriage mounted for movement transversely of the strip, a scraper Wheel freely rotatable on the carriage and positioned for rotation by peripheral contact thereof with the moving edge of the strip, and means actuating the carriage for maintaining the scraper wheel in contact with the said strip edge under substantially constant pressure.

2. An edge scraper for electrolytic tinning lines and the like wherein the ytin plate is conveyed and processed in strip form, including a carriage mounted for movement transversely of the strip, a scraper wheel freely rotatable on the carriage and positioned for rotation by peripheral contact thereof with the moving edge of the strip. means actuating the carriage for maintaining the scraper wheel in contact with the said strip edge under substantially constant pressure, and a collectorsubstantially enclosing the scraper wheel for receiving the scrapings therefrom.

3. An edgescraper for electrolytic tinning lines and the like wherein the tin plate is conveyed and processed in strip form, including a carriage mounted for movement transversely of the strip, a scraper wheel support on the carriage, a scraper wheel freely rotatable in said support and positioned thereby in peripheral contact with an edge of the strip, the region of contact of said strip and wheel being below the center of the latter, and means actuating the carriage for maintaining the scraper wheel in contact with said strip edge under substantially constant pressure.

4. An edge scraper for electrolytic tinning lines and the like wherein the tin plate is conveyed and processed in strip form, including a carriage mounted for movement transversely of the strip, a scraper wheel support on the caru riage, a scraper wheel freely rotatable in said support, said support positioning the scraper wheel transversely of the strip edge in peripheral contact therewith and being adjustable to incline said wheel in relation to the plane of said edge, and means actuating the carriage for maintaining the scraper wheel in contact with said strip edge under substantially constant pressure.

5. An edge scraper for electrolytic tinning lines and the like wherein the tin plate is conveyed and processed in strip form, including a carriage mounted for movement transversely of the strip, a scraper wheel support on the carriage, a scraper wheel freely rotatable in said support, said support positioning the scraper wheel transversely of the strip edge in peripheral contact therewith and being adjustable to incline said wheel in relation to the plane of said edge, the region of contact of said strip and wheel being below the center of the latter, and means actuating.l the carriage for maintaining the scraper wheel in contact with said strip edge under substantially constant pressure.

6. An edge scraper for electrolytic tinning lines and the like wherein the tin plate is conveyed and processed in strip form, including a base positioned transversely of the strip, carriages movable thereon adjacent the loci of the strip edges, scraper wheels freely rotatable on the carriages in substantially erect position and in peripheral contact with the edges of the strip. the regions of contact of said strip edges and the wheels being below the centers of the latter. means for urging the carriages toward the strip for engagement of the wheels with said strip edges under substantially constant pressure, and collectors mounted on the carriages substantially enclosing the scraper wheels for receiving the scrapings therefrom.

ROBERT S. DEANS. 

